Amazon.co.jp: RasTech Raspberry Pi 4 Model B (RAM 2GB) Raspberry Pi 4B with Technical Standards Mark, 32GB MicroSD Card, 5V 3A USB-Type-C Power Adapter with ON/OFF Switch, 2 MicroHDMI-to-HDMI Cable Line Raspberry
The Raspberry Pi 4 gets more RAM for $35 | TechCrunch
Official Original Raspberry Pi 4 Model B Dev Board Kit Ram 2g 4g 8g 4 Core Cpu 1.5ghz 3 Speeder Than Pi 3b+ - Demo Board - AliExpress